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Grade 200 Maraging Steel vs. ASTM A387 Grade 91 Class 2

Both grade 200 maraging steel and ASTM A387 grade 91 class 2 are iron alloys. They have 71% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is grade 200 maraging steel and the bottom bar is ASTM A387 grade 91 class 2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 9.1 to 18
20
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 74
75
Shear Strength, MPa 600 to 890
420
Tensile Strength: Ultimate (UTS), MPa 970 to 1500
670
Tensile Strength: Yield (Proof), MPa 690 to 1490
470

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 460
470
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 31
7.0
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 4.5
2.6
Embodied Energy, MJ/kg 59
37
Embodied Water, L/kg 140
88

Common Calculations

PREN (Pitting Resistance) 11
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
120
Resilience: Unit (Modulus of Resilience), kJ/m3 1240 to 5740
580
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 33 to 51
24
Strength to Weight: Bending, points 27 to 35
22
Thermal Shock Resistance, points 29 to 45
19

Alloy Composition

Aluminum (Al), % 0.050 to 0.15
0 to 0.020
Boron (B), % 0 to 0.0030
0
Calcium (Ca), % 0 to 0.050
0
Carbon (C), % 0 to 0.030
0.080 to 0.12
Chromium (Cr), % 0
8.0 to 9.5
Cobalt (Co), % 8.0 to 9.0
0
Iron (Fe), % 67.8 to 71.8
87.3 to 90.3
Manganese (Mn), % 0 to 0.1
0.3 to 0.6
Molybdenum (Mo), % 3.0 to 3.5
0.85 to 1.1
Nickel (Ni), % 17 to 19
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0 to 0.010
0 to 0.020
Silicon (Si), % 0 to 0.1
0.2 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 0.15 to 0.25
0 to 0.010
Vanadium (V), % 0
0.18 to 0.25
Zirconium (Zr), % 0 to 0.020
0 to 0.010